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W55P241 Datasheet Preview

W55P241 Datasheet

General purpose programmable I/O device

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W55P241
Table of Contents-
1. GENERAL DESCRIPTION ............................................................................................................. 2
2. FEATURES..................................................................................................................................... 2
3. PIN DESCRIPTION ........................................................................................................................ 4
4. BLOCK DIAGRAM .......................................................................................................................... 5
5. FUNCTIONAL DESCRIPTION ....................................................................................................... 5
5.1 SPI................................................................................................................................. 5
5.2 BP0/BP1/BP2 ................................................................................................................ 9
5.3 Speedup Groups ......................................................................................................... 13
5.4 Wakeup ....................................................................................................................... 13
5.5 256-Level Output ......................................................................................................... 15
6. CONTROL AND STATUS REGISTERS....................................................................................... 17
6.1 I/O port......................................................................................................................... 17
6.2 AND ............................................................................................................................. 19
6.3 OR ............................................................................................................................... 20
6.4 XOR............................................................................................................................. 21
7. ELECTRICAL CHARACTERISTICS............................................................................................. 23
7.1 Absolute maximum ratings .......................................................................................... 23
7.2 DC Characteristics....................................................................................................... 23
7.3 AC Characteristics....................................................................................................... 23
8. TYPICAL APPLICATION CIRCUIT .............................................................................................. 25
9. PACKAGE INFORMATION .......................................................................................................... 26
10. DEMO BOARD ............................................................................................................................. 30
11. ORDERING INFORMATION ........................................................................................................ 31
12. REVISION HISTORY.................................................................................................................... 31
-1-




nuvoton

W55P241 Datasheet Preview

W55P241 Datasheet

General purpose programmable I/O device

No Preview Available !

W55P241
1. GENERAL DESCRIPTION
The W55P241 is a general purpose programmable I/O device usable with many different
microprocessors through SPI interface. The W55P241 contains three 8-bit ports (BP0, BP1 and BP2).
There are 24 I/O pins which may be individually programmed for 4 separate command groups. The
W55P241 features logical operating capability AND/OR/XOR for each bit of internal configuration
register to speed up access. These I/O pins can drive LED directly with high-current applications. A
dedicated counter is in charge of 256-level output functions.
2. FEATURES
Wide range of operating voltage:
2.2~5.5V
SPI interface in mode 0
4 SPI pins for communication
/CS as chip select pin (low active)
CLK for data synchronization (up to 10MHz)
DI for W55P241 to receive commands and data
DO for the microcontroller to receive data
1 wakeup pin for the microcontroller
24 I/O pins
24 bi-directional I/O pins with 25mA of sink current
Status of each pin independently controlled
o Input
Floating
Pull high
Pull low
Dynamic pull low
Dynamic pull high
o Output
CMOS high/low
Inverted CMOS high/low
Inverted open-drain NMOS output
Open-drain PMOS output
Any pin can be selected to wake up the chip
Logic AND/OR/XOR to execute high-speed operations for each of these I/O control
register bits
Built-in 8 LED outputs with 256-level brightness control in the BP0 port
Internal ring oscillator @ 8MHz
4 clock sources
o Clock/512, /256, /64, /16
-2-


Part Number W55P241
Description General purpose programmable I/O device
Maker nuvoton
Total Page 30 Pages
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